Stable Ultramicroporous Metal-Organic Framework with Hydrophilic and Hydrophobic Domains for Selective Gas Adsorption.

ABSTRACT: Herein, we report the thermal and chemical stability, and the gas adsorption behavior, of a mixed-linker phosphonate MOF, [Cu(4,4'-bpy)_0.5(1,4-NDPAH₂)], namely TUB41 (where bpy = bipyridine and NDPAH₄ = naphthalenediphosphonic acid). TUB41 demonstrates remarkable chemical stability across a wide pH range (1-11) and retains its structural integrity after 2 years of repeated adsorption cycles and activation at 80 °C under ambient humidity. Cryogenic adsorption experiments reveal that TUB41's pores selectively exclude gases with larger kinetic diameters, such as N₂ and Ar, while accommodating smaller molecules like CO₂ and H₂O at elevated temperatures. The enthalpies of adsorption for CO₂ at a loading 0.01 mmol g

SUBMITTER: Oestreich R 

PROVIDER: S-EPMC12462748 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature